fix compatibility issue with the newest paddle (#218)

* fix compatibility issue with the newest paddle

* remove logging lines
Co-authored-by: Nrobot <zenghongsheng@baidu.com>

parl/algorithms/fluid/a3c.py

@@ -72,6 +72,7 @@ class A3C(Algorithm):
         policy_entropy = policy_distribution.entropy()
         entropy = layers.reduce_sum(policy_entropy)
 
+        entropy_coeff = layers.reshape(entropy_coeff, shape=[1])
         total_loss = (
             pi_loss + vf_loss * self.vf_loss_coeff + entropy * entropy_coeff)
 

parl/algorithms/fluid/maddpg.py

@@ -27,10 +27,11 @@ from parl.core.fluid.policy_distribution import SoftMultiCategoricalDistribution
 
 
 def SoftPDistribution(logits, act_space):
-    """input:
+    """Args:
             logits: the output of policy model
             act_space: action space, must be gym.spaces.Discrete or multiagent.multi_discrete.MultiDiscrete
-        output：
+
+        Return:
             instance of SoftCategoricalDistribution or SoftMultiCategoricalDistribution
     """
     # is instance of gym.spaces.Discrete